Google+ (GOOG), the new social networking service, drew ~25M visitors in less than a month,...

Google+ (GOOG), the new social networking service, drew ~25M visitors in less than a month, outpacing Facebook and MySpace (NWS) in their early days, ComScore says. Engagement on the site also is increasing, as the average number of days per week U.S. visitors used the service rose 39% and 11% in the past two weeks.